Приложение: KRuler
Инструменты, технологии Экранная линейка - Screen Ruler
[ О приложении ]
KRuler is an on-screen ruler for measuring pixels.
Position the 0 at your starting point and measure the precise pixel distance between the starting point and your cursor.
Источник
Репозиторий: flathub
Приложение
KRuler в репозиториях другого типа:
Application
FlatPak: KRuler [Graphics & Photography]